Infiniti Q45. Manual - part 20

 

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Infiniti Q45. Manual - part 20

 

 

TROUBLE DIAGNOSIS FOR SYMPTOMS

ACS-73

[ICC]

C

D

E

F

G

H

I

J

L

M

A

B

ACS

4. 

CHECK ICC WARNING CHIME SIGNAL

With CONSULT-II

1.

Select “ICC BUZZER 1” on “ACTIVE TEST” with CONSULT-II.

2.

Check voltage signal between ICC warning chime harness connector and ground.

With LDW models

Without LDW models

OK or NG

OK

>> 1. Replace ICC warning chime.

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

NG

1 >> In the case of 12 V: GO TO 5.

NG

2 >> In the case of 0 V:

1. Replace ICC warning chime.

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

Terminals

Voltage (Approx.)

(+)

(-)

ICC warning chime 

connector

Terminal

M22

3

Ground

 

PKIC4921E

PKIA9674E

Terminals

Voltage (Approx.)

(+)

(-)

ICC warning chime 

connector

Terminal

M37

2

Ground

 

PKIA9824E

PKIA9674E

ACS-74

[ICC]

TROUBLE DIAGNOSIS FOR SYMPTOMS

5. 

CHECK HARNESS BETWEEN ICC UNIT AND ICC WARNING CHIME

1.

Turn ignition switch OFF.

2.

Disconnect ICC unit connector and ICC warning chime connector.

3.

Check continuity between ICC unit harness connector (A) and ICC warning chime harness connector (B).

With LDW models

Without LDW models

OK or NG

OK

1 >> With LDW models: GO TO 6

OK

2 >> Without LDW models

1. Replace ICC warning chime.

2. Erase DTC and perform ICC system running test.

Then perform self-diagnosis of ICC system again.

NG

>> 1. Repair harness between ICC unit and ICC warning chime.

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

6. 

CHECK ICC WARNING CHIME GROUND CIRCUIT

Check continuity between ICC warning chime harness connector
and ground.

OK or NG

OK

>> 1. Replace ICC warning chime.

2. Erase DTC and perform ICC system running test.

Then perform self-diagnosis of ICC system again.

NG

>> 1. Repair harness between ICC warning chime and

ground.

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

A

B

Continuity

 Connector

Terminal

Connector

Terminal

B243

21

M22

3

Yes

PKIC4923E

A

B

Continuity

Connector

Terminal

Connector

Terminal

B243

21

M37

2

Yes

PKIC6047E

ICC warning 

chime connector

Terminal

Ground

Continuity

M22

8

No

PKIC4922E

TROUBLE DIAGNOSIS FOR SYMPTOMS

ACS-75

[ICC]

C

D

E

F

G

H

I

J

L

M

A

B

ACS

Symptom 6: Chime Does Not Stop

NKS001L7

1. 

CHECK ICC WARNING CHIME CIRCUIT 

1.

Turn ignition switch OFF. 

2.

Disconnect ICC unit connector.

3.

Turn ignition switch ON.

Does chime sound?

YES

>> GO TO 2.

NO

>> 1. Replace ICC unit.

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

2. 

CHECK HARNESS BETWEEN ICC UNIT AND ICC WARNING CHIME 

1.

Turn ignition switch OFF.

2.

Disconnect ICC warning chime connector.

3.

Check continuity between ICC unit harness connector and
ground.

OK or NG

OK

>> 1. Replace ICC warning chime.

2. Erase DTC and perform ICC system running test.

Then perform self-diagnosis of ICC system again.

NG

>> 1. Repair harness between ICC unit and ICC warning chime.

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

Symptom 7: Driving Force Is Hunting

NKS001L8

1. 

PERFORM ECM SELF-DIAGNOSIS

Perform ECM self-diagnosis.

OK or NG

OK

>> Refer to 

ACS-75, "Symptom 8: ICC System Frequently Cannot Detect the Vehicle Ahead/ Detec-

tion Zone Is Short"

 .

NG

>> After repairing applicable parts, erase DTC. Perform ICC system running test, and then perform

self-diagnosis of ICC system again.

Symptom 8: ICC System Frequently Cannot Detect the Vehicle Ahead/ Detection 
Zone Is Short

NKS001L9

The detection function may become unstable in the following cases

When the reflector of the vehicle ahead is deficient/ not clean enough to reflect the radar.

When driving a road with extremely sharp corners.

When the radar cannot detect the reflector of the vehicle ahead as the vehicle ahead is passing a hill or
passing the peak.

1. 

VISUAL CHECK 

Check ICC sensor body window for contamination and foreign materials.
Is it found?

YES

>> If any contamination or foreign materials are found, remove them. Then perform ICC system run-

ning test.

NO

>> GO TO 2.

ICC unit connector

Terminal

Ground

Continuity

B243

21

No

PKIC6048E

ACS-76

[ICC]

TROUBLE DIAGNOSIS FOR SYMPTOMS

2. 

ADJUST LASER BEAM AIMING

1.

Adjust laser beam aiming.

2.

Perform ICC system running test. Check if preceding vehicle detection performance has been improved.

Is it improved?

YES

>> INSPECTION END

NO

>> 1. Replace ICC sensor, and perform laser beam aiming adjustment. 

ACS-14, "LASER BEAM AIM-

ING ADJUSTMENT"

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again. 

ACS-11, "ICC System Running Test"

Symptom 9: The System Does Not Detect the Vehicle Ahead at All

NKS001LA

1. 

VISUAL CHECK 1

With ignition switch turned ON (engine not started), check if all indicator lamps in ICC system display are con-
tinuously lit. (Check for a missing segment in preceding vehicle detection display.) 

OK or NG

OK

>> GO TO 2.

NG

>> Check for combination meter. Refer to 

DI-22, "ICC System Display Does Not Illuminate"

 . 

2. 

 VISUAL CHECK 2

Check ICC sensor body window for contamination and foreign materials.

Is it found?

OK

>> If any contamination or foreign materials are found, remove them. Perform ICC system running

test. 

NG

>> GO TO 3.

3. 

VISUAL CHECK 3

Check ICC sensor body window for cracks and scratches.

Is it found?

YES

>> 1. Replace ICC sensor, and perform laser beam aiming adjustment.

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

NO

>> GO TO 4.

4. 

ADJUST LASER BEAM AIMING

1.

Adjust laser beam aiming.

2.

Perform ICC system running test. Check if preceding vehicle detection performance has been improved.

Is it improved?

YES

>> INSPECTION END

NO

>> 1. Replace ICC sensor, and perform laser beam aiming adjustment.

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

 

 

 

 

 

 

 

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